Snowboarder Shaun White tells Ski Sunday's Ed Leigh the Winter Olympics give him "purpose" but admits a low often follows the high of victory.
The American will go for double Olympic gold at Sochi 2014 in the half-pipe and slopestyle, having won half-pipe gold medals at both the Turin 2006 and Vancouver 2010 Games.
White adds that he "wears his emotions on his sleeve" in competitions and is pleased to see the traditionally laid-back sport becoming more competitive.
Watch more of this interview when Ski Sunday returns at 17:55 GMT on Sunday, 15 December on BBC Two, online and on connected TV.
You can also watch live coverage of the Ski Cross from Val Thorens from 09:55 GMT on the Red Button, online and on connected TV earlier in the day.